<template>
  <div>
 <!-- 面包屑导航 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
  <!-- 卡片视图区域 --> 
  <el-card>
      <el-alert
        title="添加商品信息"
        type="info" :closable="false"
        center
        show-icon>
    </el-alert>
    <!-- 步骤条区域 -->
    <el-steps align-center
    :space="200" :active="activeIndex-0" finish-status="success">
    <el-step title="基本信息"></el-step>
    <el-step title="商品参数"></el-step>
    <el-step title="商品属性"></el-step>
    <el-step title="商品图片"></el-step>
    <el-step title="商品内容"></el-step>
    <el-step title="完成"></el-step>
    </el-steps>
    <!-- tab栏区域 -->
    <el-form :model="addForm" 
    :rules="addFormRules" 
    ref="addFormRef" 
    label-position="top"
    label-width="100px">
    <el-tabs v-model="activeIndex" :tab-position="'left'" 
    :before-leave="beforeTabLeave" @tab-click="tabClicked">
    <el-tab-pane label="基本信息" name="0">
        <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
        </el-form-item>
         <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number"></el-input>
        </el-form-item>
         <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addForm.goods_weight" type="number"></el-input>
        </el-form-item>
         <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品分类" prop="goods_cat">
        <el-cascader
        v-model="addForm.goods_cat"
        :options="cateList"
        :props="cateProps"
        @change="handleChange"></el-cascader>   
        </el-form-item>      
    </el-tab-pane>
    <el-tab-pane label="商品参数" name="1">
        <!-- 渲染表单的item项 -->
        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
            <!--复选框组  -->
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
            </el-checkbox-group>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品属性" name="2">
        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
            <el-input v-model="item.attr_vals"></el-input>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品图片" name="3">
        <el-upload :headers="headerObj" :on-success="handleSuccess"
        action="http://127.0.0.1:8888/api/private/v1/upload"
        :on-preview="handlePreview"
        :on-remove="handleRemove"
        list-type="picture">
        <el-button size="small" type="primary">点击上传</el-button>
        <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
        </el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
    <!-- 添加商品按钮 -->
    <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
    </el-tab-pane>
  </el-tabs>
  </el-form> 
  </el-card>

  <!-- 图片预览 -->
  <el-dialog
    title="图片预览"
    :visible.sync="previewVisible"
    width="50%"
   >
    <img :src="previewPath" alt="" class="previewImg">
    
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
data(){
    return{
        activeIndex:'0',
        addForm:{
            goods_name:'',
            goods_price:0,
            goods_weight:0,
            goods_number:0,
            goods_cat:[],
            pics:[],
            goods_introduce:'',
            attrs:[]
        },
        addFormRules:{
            goods_name:[
                {required: true, message:'请输入商品名称', trigger: 'blur'}
            ],
            goods_price:[
                {required: true, message:'请输入商品价格', trigger: 'blur'}
            ],
            goods_weight:[
                {required: true, message:'请输入商品重量', trigger: 'blur'}
            ],
            goods_number:[
                {required: true, message:'请输入商品数量', trigger: 'blur'}
            ],
            goods_cat:[
                {required: true, message:'请选择商品分类', trigger: 'blur'}
            ]
        },
        cateList:[],
        cateProps:{
            value:'cat_id',
            label:'cat_name',
            children:'children',
            expandTrigger: 'hover',
            
        },
        manyTableData:[],
        onlyTableData:[],
        headerObj:{
            Authorization:window.sessionStorage.getItem('token')
        },
        previewPath:'',
        previewVisible:false
        

    }
},
created(){
    this.getCateList()
},
methods:{
    async getCateList(){
        const {data:res}=await this.$http.get('categories')
            
            if(res.meta.status!=200) return this.$message.error('获取商品列表失败')
             console.log(res.data);
             this.cateList=res.data
             this.total=res.data.total
        
    },
    handleChange(){
        console.log(this.addForm.goods_cat);
        if (this.addForm.goods_cat.length!=3) {
           this.addForm.goods_cat=[]
        }
    },
    beforeTabLeave(activeName,oldActiveName){
        // console.log('即将离开的标签页'+oldActiveName);
        // console.log('即将进入的标签页'+activeName);
        if(oldActiveName==='0'&&this.addForm.goods_cat.length!=3){
            this.$message.error('请先选择商品分类！')
            return false
        }

    },
    async tabClicked(){
        if (this.activeIndex==='1') {
            const { data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{
                params:{
                    sel:'many'
                }
            })


            if(res.meta.status!=200) return this.$message.error('获取动态参数列表失败')
            console.log(res.data);
            res.data.forEach(e => {
                e.attr_vals=e.attr_vals.length===0?null:
                e.attr_vals.split(' ')
            });
            this.manyTableData=res.data
        }else if(this.activeIndex==='2') {
            const { data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{
                params:{
                    sel:'only'
                }
            })


            if(res.meta.status!=200) return this.$message.error('获取动态参数列表失败')
            console.log(res.data);
            this.onlyTableData=res.data
        }



    },
    handlePreview(file){
        console.log(file);
        this.previewPath=file.response.data.url
        this.previewVisible=true
    },
    handleRemove(file){
        console.log(file);
        const filePath=file.response.data.tmp_path
        const i =this.addForm.pics.findIndex(e=>{
            e.pics===filePath
        })
        this.addForm.pics.splice(i,1)
        console.log(this.addForm);

    },
    handleSuccess(res){
        console.log(res);
        const picInfo = {pics:res.data.tmp_path}
        this.addForm.pics.push(picInfo)
        console.log(this.addForm);
    },
    add(){
        console.log(this.addForm);
        this.$refs.addFormRef.validate(async (valid) => {
            if (!valid) return this.$message.error('请填写必要的表单项！')
            const form= _.cloneDeep(this.addForm)
            form.goods_cat=form.goods_cat.join(',')
            this.manyTableData.forEach(item=>{
                const newInfo={
                    attr_id:item.attr_id,
                    attr_value:item.attr_vals.join(' ')
                }
                this.addForm.attrs.push(newInfo)
            })
            this.onlyTableData.forEach(item=>{
                const newInfo={
                    attr_id:item.attr_id,
                    attr_value:item.attr_vals
                }
                this.addForm.attrs.push(newInfo)
            })
            form.attrs=this.addForm.attrs
            console.log(form);

             const { data:res}=await this.$http.post(`goods`,form)


            if(res.meta.status!=201) return this.$message.error('添加商品失败')
            this.$message.success('添加商品成功')
            this.$router.push('/goods')
            

        })
    }

},
computed:{
    cateId(){
        if (this.addForm.goods_cat.length===3) {
            return this.addForm.goods_cat[2]
        }
        return null
    }
}
}
</script>

<style lang="less" scoped>
.el-checkbox{
    margin-right: 10px !important;
}
.previewImg{
    width: 100%;
}
.btnAdd{
    margin-top: 15px;
}
</style>